Scale-platform clearer



March 4, 1930. L. w. NORTHFIELD ET AL 1,749,599

SCALE PLATFORM CLEARER Filed Dec. 19, 1927 Patented Mar. 4, 1930 LUKE W. NORTHFIELD, WESLEY A. NORTHFIELD,

MINNEAPOLS, MINNESOTA SCALE-PLATFORM GLEARER Application filed December 19, 1927.

This invention relates to a scale construction, and particularly to a construction adapted to clear obstructions between the scale platform and frame. In scales of the platform type which are used to weigh various materials such as that carried in wagons and cars, there is a space between the movable platform and the frame which also often becomes clogged by material dropping about the scale. Such material getting in between the platform and frame interferes with the proper functioning the scale.

It is an object of this invention, therefore, to provide a simple and efficient means, particularly at the ends of the scales, which will effectively remove any material getting in between the alatform and frame in the norn mal operation of the scale.

It is more specifically an object of the invention to provide a simple and efficient means comprising a member secured to either the platform or scale' frame having a projecting and comparatively thin edge adapted to cut through any obstruction so as to remove the same from the space between the platform and scale, in the movements of the platform.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the'accompanying drawings, in which like reference characters refer to similar parts throughout the several views and in which Fig. 1 is a plan view of the scale having the invention applied thereto;

Fig. 2 is a vertical section taken on line 2-2 of Fig. l as indicated by the arrows; and

Fig. 3 is a view similar to Fig. 2, showing a modification.

Referring to the drawings, in Fig. 1 a por tion of the scale construction is shown, comprising the frame 5 extending about and spaced slightly from the edge of the platform (i, adapted to receive the load to be weighed. The frame 5 as shown comprises a wall surrounding a pit, at the top of which platform 6 is disposed, which pit is adapted to receive the weighing and platform sup- Serial No.

porting mechanism not shown.

rial to be weighed can be placed on forni 6 in any m is often drawn in scales adapted tracks are usua track is shown in Fig. l,

AND GLENN H. NOBTHFIELD, OF

The matethe platanner, and as is well known, thereon in wagons or cars.

lly provided and a portion of which is shown on form 6. rEhe platform 6 to weigh material in cars, 5

such car having the rails 7,

the platis shown as comprising timbers oIL extending longitudinally,

vto which secured timbers 6b.

llhile the frame of any desired. mater f the invention` illustr the cross planks or 5 may be made ial, in the embodiment ated it is shown as comprising a concrete or masonry frame.

ln accordance a member 8 is secured `tending along the edge thereof, a

this member may be vari the embodiment it is shown as of with the present i angular form, havi iecting side 8 with a terminal and rlhe member 8 is substantively thin edge.

vWhile the memb edge of the pla'tfor the embodiment of the platform p nvention,

to the platform 6 exnd while ously formed, in of the invention illustrated ng a procomparaone side extending ortion 6b 75 and having its top substantially flush with platform, one arm or side extending over the top edge of said platform.

8 can be placed. along any in, it preferably, and in of the invention illustrated is shown disposed at each end of form G. rlhe frame 5 has a member thereto, and while this m riously formed,

tending along the inner side and is secured by any the plat- 9 secured ember may be vait preferably has a side eX- suitable me as the bolts 10. ln the embodiment vention illustrated, the member,` 9

the sides of which are substantially flush with the top and sides of the as an angle bar,

frame.

Then a wagon, moved onto the plat tudinal movement o the vehicle is drawn off th of the frame ans, such of the inis shown car or other vehicle is form 6, there is a longif said platform. When to the friction of the wheels on the platform,

the latter is drawn longitudinal the vehicle is off the platform, the

swings back to i ts normal position.

e platform, owing ly, and when platform Should im '1125 top substantially fiush any material such as coal, pieces of ice or snow, drop into the space between the edge of the platform and frame and be retained between member 8 and the side of the frame, such material will be cut by the edge of the portion 8fl of the member 8 in the longitudinal movement of the platform, so that when the platform assumes its normal position, such obstruction will be removed and will drop into the space beneath the platform. he momentum of the platform 6 is considerable and with the load to be weighed thereon, there is a large force placed on the material engaged between the members 8 and 9. In the modification shown in Fig. 3, the platform 6 has an angle member 11 extending along the ends thereof, one side of which is Set into the top of the platform so as to be Hush with the top thereof and the other side of which extends downward along the ,edge of the platform. The frame member 5 has a member 12 extending along its end edge, which member is substantially of the `shape of member 8, said member having its with the top of frame 5 and being secured thereto by any suitable means, such as the headed and nutted bolts 13. The member 12 has a projecting side 12*l having a free terminal edge which is quite narrow, directed inward toward the member l1.

yIn the operation of the form shown in Fig. 3, any obstructions which lodge between the members 11 and 12 will be cut and crushed so as to be released when platform 11 moves toward the frame 5.

From the above description it is seen that applicant has provided a very simple and efficient clearing means for a scale comprising a frame and movable platform. The edge of the member which projects from the platform or frame is quite thin so that it will readily cut through the obstruction and permit the same to drop into the wider space below. The space between the platform and scale frame is thus kept clear. Applicant-s device is very simple in construction, the same has been amply demonstrated in actual practice and found to be very successful.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which, generally 5 stated, consists in a device capable of carrying out the objects above set forth, in the novel parts and combinations of parts dis-` 'closed and defined inthe What is claimed is:--

1. A platform scale for weighing matter in vehicles having in combination, a frame over which vehicles are adapted to pass, said vframe having a rectangular opening therein, arigid platform shaped similarly t0 and disposed in said opening and of smaller diappended claims.

mensions than said opening and constructed and arranged to have vehicles move thereon from said frame and to support said vehicles, the top of said platform bein substantially flush with the top of said rame, a metal member secured to one of said parts and having a horizontal side with the thin edge projecting toward the other part, said other part having a metal member secured thereto having a vertical surface opposite said edge whereby in the relative movement of said frame and platform caused by vehicles moving thereon any obstruction caught between said metal members will be cut or crushed and will drop below said edge whereby the space between said metal members will be cleared.

2. A scale construction having in combination, a platform having longitudinal movement, a frame surrounding said platform and spaced from the edge thereof, a metal bar secured to the end of said platform having a, side projecting outwardly substantially at the top of said patform, said side having a terminal narrow edge projecting toward said frame, a metal bar secured in said frame having a surface opposite said edge whereby said edge will cut through any material which may lodge between said bars. and said material will be cleared from the tween the edge of said platform frame.

3. A platform scale construction having in combination, a frame having a substantially vertical inner' side and comprising a wall surrounding a rectangular pit, a track on said frame, a rigid rectangular platform disposed within said frame at the top of said pit and slightly spaced from said frame at the sides and ends, said platform being movable endwise in said frame, a track upon said platform aligned with said first mentioned track, a metal member secured to the end of said platform and having a horizontal projecting flange of comparatively small dimension at the top of said platform, said frame having a metal surface thereon in alignment with said Harige whereby any obstruction being located in the space between said Hange and frame will be cut and released in the relative movement of said frame and platform.

In testimony whereof we tures.

LUKE W. NORTHFIELD. WESLEY A. NORTHFIELD. GLENN H. NORTHFIELD.

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